normalize phone

src/modules/coupons/providers/coupon.service.ts

@@ -235,7 +235,7 @@ export class CouponService {
     }
   }
 
-  generateShortCode(length = 8) {
+  generateShortCode(restaurantSlug: string, length = 5) {
     const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
     const bytes = randomBytes(length);
     let result = '';
@@ -243,12 +243,16 @@ export class CouponService {
     for (let i = 0; i < bytes.length; i++) {
       result += chars[bytes[i] % chars.length];
     }
-
-    return result;
+    const prefix = restaurantSlug.slice(0, 2);
+    return prefix + '-' + result;
   }
 
   async generateCouponCode(restId: string): Promise<string> {
-    const code = this.generateShortCode(8);
+    const restaurant = await this.restRepository.findOne({ id: restId });
+    if (!restaurant) {
+      throw new NotFoundException(RestMessage.NOT_FOUND);
+    }
+    const code = this.generateShortCode(restaurant.slug);
     const existing = await this.couponRepository.findOne({ code, restaurant: { id: restId } });
 
     if (existing) return this.generateCouponCode(restId);